The 6 year project to remaster Babylon 5 is done, but you can only get the remastered series streaming, no word on a blu-ray release. It's on HBO-MAX, and you can buy it on Amazon and iTunes.
$30 a season X 5 seasons = $150...
I may buy one episode just to see how it looks, then see if I feel like spending that much for the series, the DVDs do look kind of terrible on a 55 inch TV.
Edit: $30 a season not $40, and I did some digging and Vudu has a bundle of all 5 seasons in HDX for $70. That is much better, probably about the same cost if a blu-ray set ever comes out.